344 BULLETIN OF THE BUREAU OF FISHERIES. 



Subfamily MASTIGOTEUTHIN.E (Verrill 1881) Chun 1908. 



Mastigoteulhida? Verrill 1881a, p. 100. 

 Mastigoteulhinee Chun 1908, p. 87. 

 Mastigoleuthince Chun 1910, p. 219, 220. 

 M ' astigoteuthineB Pfeffer 1912, p. 540, 608. 



Olfactory tubercle or papilla short-stalked. Tentacles long and slender; club not expanded and 

 without glandular swellings at tip. Photogenic organs in some cases numerously developed over the 

 entire integument, sometimes lacking; no photophores upon the eyeball or within the pallial chamber. 



Genus MASTIGOTEUTHIS Verrill 1881. 



Mastigoteuthis Verrill 1881a, p. 100. 

 Mastigoteuthis Pfeffer 1900. p. 184, 187. 

 Mastigoteulhis Chun 1910. p. 220. 

 Mastigoteuthis Pfeffer 1912. p. 609. 



The characters of this genus coincide with those of the subfamily of which it is the only known 

 representative. 



Type. — Mastigoteulhis Agassizii Verrill 1881 (monotypic); a North Atlantic species. 



Mastigoteuthis (?) famelica (Berry 1909) Pfeffer 1912. (PI. m, fig. 6-8.) 



Chiroteuthis famelica Berry igt>9, pp. 414, 419, fig. 8. 

 Mastigoteuthis (?) famelica Pfeffer 1912, p. 624. 



Animal small, graceful, its outlines attenuate. Mantle cylindrical, extremely long and narrow; 

 gradually tapering for a little more than half its length, then becoming suddenly constricted to continue 

 as an exceedingly slender and delicate spit extending between the fins and somewhat exceeding them 

 posteriorly; anterior margin sinuous, inflated, projecting in an obtuse point in the medio-dorsal line. 

 Fins enormous, leaflike, not lobed; at the base relatively thick and fleshy, but thin at the margins; 

 each one about three times as long as wide and extending for a little more than half the length of the 

 mantle ; separated only by that portion of the slender posterior extension of the mantle which covers the 

 delicate gladius; in front the attached margins extend well forward on the dorso-lateral surfaces of the 

 main body. 



Head small, narrower than the body except across the eyes, whence it rapidly tapers to the narrow 

 elongate neck (the neck is rather longer than wide); dorsal and ventral surfaces flattened. Eyes large, 

 rounded, conspicuous, somewhat protruding; very anterior in position. "Olfactory papilla " short, but 

 possibly not well represented in the present specimen. Funnel small, broadly conical, not quite reach- 

 ing to the eyes. Funicular locking cartilages deep, ear-shaped, with ridges to correspond on the inner 

 surface of the mantle. 



Arms, except the ventrals, extremely short in proportion to the length of the body; decidedly 

 unequal, the order of relative length being 4, 2, 3, 1. Ventral arms enormously developed, about three 

 times as long as the others and half as long as the body; squarish; sucker-bearing surface very narrow 

 in proportion to the total diameter of the arm and furnished with two alternating rows of distant minute 

 slender pediceled suckers, the horny rings of the latter minutely toothed. Remaining arms more nearly 

 of a length, the dorsal pair a little the shortest and weakest; their suckers slightly larger and more 

 crowded. All the arms obscurely keeled. Umbrella and lateral membranes wanting. 



Tentacles missing. 



Gladius extremely long and slender, the posterior cone terminating in a long needle-like point; 

 visible through the dorsal integument as a dark medio-longitudinal line. 



Color in alcohol a pale brownish buff; chromatophores brown but very sparsely distributed. Such 

 portions of the outer integument as remain intact are devoid of photogenic organs, and I have not 

 succeeded in identifying any of these structures upon the eyeball. 



